scientists are debating how to limit their newly-discovered阅读理解答案

《scientists are debating how to limit their newly-discovered阅读理解答案》由会员上传分享，免费在线阅读，更多相关内容在应用文档-天天文库。

1、Scientistsaredebatinghowtolimittheirnewly-discovered阅读理解答案　　Scientistsaredebatinghowtolimittheirnewly-discoveredpowertochangegenetic　　structure.Scientistsalreadymodifythegenesoffarmanimalsandagriculturalplantstomake　　themmoreproductiveorstronger.Butnowtheycanalsochangegenesin

2、wildanimalsand　　plants.Thesegeneswouldcontinueintolatergenerations.Forexample,itmaybepossible　　forscientiststoremovefromexistencethekindofmosquitoesthatcarrytheZikavirus.They　　mightalsobeabletopermanentlyremovespeciesofplantsandanimalsthataredestructiveto　　otherspecies.　　Inar

3、eportpublishedlastweek,theU.S.NationalAcademiesofSciences,Engineering　　andMedicine(NAS)saiditsupportscontinuedresearchonthiskindofgenecontrol.Butit　　warnedthatitisnotpossibletoknowwhatwillhappenwhenthesechangedplantsand　　animalsarereleasedintothewild.　　Sixteenbiologists,ethic

4、ists(伦理学家)andpolicymakersareonanNAScommitteethat　　isexaminingtheissue.Theysaythatthereisvaluetothenewtechnology.But,theysay,　　thereisnotenoughevidencetosupportthereleaseofmodifiedorganisms(生物体)fromthe　　laboratoryintonature.　　Manypeoplewouldsupportstoppingmosquitoesandratsfrom

5、carryingdiseases.But　　scientistssaywemustunderstandthepossiblescientific,ethical,legalandsocialresultsof　　suchactionbeforewedecidewhethertotakeit.Genemodificationisspreadthrough　　reproduction(繁殖).　　Changedgeneswillcontinuetospreadaslongasananimalorplantcontinuesto　　reproduce.

6、Theycannotbelimitedtoafarmorkeptwithinacountry’sborders.Scientistsare　　wonderingwhatmayhappenifamodifiedorganismmateswithanotherspecies.Theyarenot　　yetsurehowthemodifiedgeneswouldaffecttheotherspecies.Itispossiblethatthosegenes　　couldharmthosecreaturesorevenleadtotheirdisappe

7、arancefromourplanet.　　32.Whatpossibleadvantagedoesgenecontrolinwildanimalsandplantshave?　　A.ChangingtheZikaviruspermanently.　　B.Removingthedestructivespeciesforever.　　C.Havingchangedgenesintheirnextgenerations.　　D.Makingallthespeciesmoreproductiveandstronger.　　33.Asforgenetic

8、allychangedwildanimalsandplants,whatarescientistsworriedabout?　　A.Th